Pump.



PATENTED JAN. 2', 1906. A. K. MILLER.

PUMP.

APPLICATION FILED APR-.14. 1905.

INVENTOR .JTWZFE M2561 BY www@ #fd ATTORNEYS.

UNITED S i ES TENT FFIIE.

PUMP..

Specification of Letters Patent.

Patented. Jan. 2, 1906.

Application led April 14, 1905. Serial No. 255,520.

To a/ZZ whom t may concern:

Be it known that I, ARTHUR K. MILLER, a citizen of the United States,residing at Peekskill, Westchester county, and State of New York, haveinvented certain new and useful Improvements in Pumps, of which thefollowing is a i'ull, clear, and exact specification.

My invention relates to improvements in apparatus for compressing fluidsand the same has for its object more particularly to provide a simple,eliicient, and reliable pump for use in connection with inflatable tiresand different other forms of containers adapted to hold fluids underpressure.

Further, said invention has for its object to reduce the cost ofmanufacture, to so improve the construction of the pump as to render thesame more rigid and less subject to injury or strain at the junction ofits parts, and to provide a pump which may be easily set together ortaken apart in order to permit of the cleaningI of its parts or themaking of repairs therein.

To the attainment of these objects above set forth, my inventionconsists in the novel details of construction, and in the combination,connection, 'and arrangement of parts hereinafter more fully describedand then pointed out in the claims.

In the accompanying drawings, forming part of this specification,wherein like numerals of reference indicate like parts, Figure 1 is aside view illustrating a pump constructed according to and embodying mysaid invention. Fig. 2 is a central vertical section of the same, on anenlarged scale and partly broken out.

In said drawings, 5 denotes a footpump comprising a stirrup orfoot-piece 6, forming a support or basefor a socket 7, having aprojecting portion 8 at one side thereof provided with a bore 9,terminating in a screw-threaded portion 10 at its upper end. Theinterior of the socket 7 is stepped, so as to form a shoulder orabutment 1 1 about midway of its height, thus forming an lopening of twodifferent diameters, the diameter of the upper portion being materiallywider than that of the lower portion, which latter is further providedwith screw-threads,

l2 denotes a diagonal bore extending from the base of the socket 7 andconnecting with the lower end of the bore 9 in the projecting portion 8of the socket. ggWithin the socket 7 and dis osed upon its base is aresilient annular was er or packing 13, and 14 denotes acylinder-section, which is open at both ends and provided upon its outersurface at said ends with screw-threads. Said cylinder 14 is provided atits ends with enlarged portions 15, as shown at Fig. 2,*or the same maybe provided with a short inwardly-projecting flange. The lower end ofsaid cylinder 14 is adapted to be screwed into the screw-threadedportion of the socket 7 until its lower edge is firmly seated upon thepacking 13. 16 denotes a cap for closing the upper end of said cylinder14, said cap being provided upon its under side with a stepped socket17, having a shoulder 18 therein and screw-tlireads 19 upon the narrowerportion thereof above said shoulder 18. The upper end of the cylinder 14is adapted for securement to said cap 16 by screwing the upper endthereof into the screw-threaded portion of said cap.

21 denotes a piston arranged within the cylinder 14, having a rod 22,which entends through the cap 16 and is provided at its upper end with ahandle 23. v

24 denotes a volute spring which is disposed about the cylinder 14 toprotect said cylinder against fracture or injury by pressure producedtherein and against injury thereto from without, such as denting thesame, and thereby preventing the proper operation of the piston 21therein. n Said spring 24 has its lower end disposed in the socket 7 andbearing upon the shoulder 11 therein and completely fi ling the spaceabove said shoulder intermediate the inner wall of the socket and theouter wall of the cylinder 14, the upper end of said spring beingsimilarly held in the socket of the cap 16.

lt is to be noted that in the construction illustrated and described thecylinder 14 is held firmly attached to the socket in the stirrup 6 bythe engagement of its threaded lower end with the thread portion of thesocket and all possible swaying or oscillation of the upper portion ofsaid cylinder prevented by the introduction of the lower end of thespring 24 in the space provided in the wider portion of the socket whichis adapted to receive the end of said spring 24, and which the springfits snugly and completely fills.

I-Iaving thus described my invention, what I claim, and desire tosecure, by Letters Patent, is

1. A pump comprising a casing open at its ends, a piston and rod, asupport for said casing having a socket therein and adapted for IOO lIO

securement to the lower end of said casing, and having an annular recessat its upper edge, a cap adapted for securement to the upper end of saidcasing having an annular recess at its lower edge, and a volute springdisposed about said casing and having its ends bearing against andconfined by the recesses in said cap and socket, substantially asspecified.

2. A pump comprising a casing open at its ends, a piston and rod, asupport for said casmg having a socket therein and adapted forsecureinent to said casing; a shoulder in.

said socket above the lower end of said casing, a cap adapted forsecureinent to the upper end of said casing, a shoulder in said socketbelow the upper edge of said casing, and a volute spring disposed aboutsaid cylinder and having its ends confined within the sockets of saidsupport and cap and bearing against the shoulders therein, substantiallyas specified.

8. A pump comprising a casing open at its ends, screw-threads upon saidcasing at its ends, a piston and rod, a support for said casing having asocket therein consisting of a screw-threaded portion adapted to engagethe threaded end of said casing, and a larger unthreaded portionadjoining the same, an annular packing in the base of said socket, a caphaving a socket in its under side consisting of a screw-threaded portionadapted to engage the threaded upper end of said casing, and anuiithreaded larger portion adj oining the same, and a volute springdisposed about and encompassing said casing, having its ends disposedwithin the larger opposing portions of the sockets in the cap andsupport, and bearing upon the shoulders therein, substantially asspecified.

4. A pump comprising a casing open at its ends, screw-threads upon theouter surface of said casing at the ends thereof, a piston and rod, asupport for said casing having a socket therein comprising ascrew-threaded portion adapted to engage the screw-threads at the lowerend of the casing, a larger portion adjoining said screw-threadedportion, and a shoulder intermediate said socket portions, an annularpacking disposed in the base of the threaded portion of said socket, acap having a socket in its under side comprising a screw-threadedportion adapted to engage the threaded upper end of the casing, and alarger portion adjoining said threaded portion, a shoulder providedintermediate said socket portions, and a volute spring disposed undercompression about said cylinder and having its ends confined by saidenlarged socket portions of said cap and support and bearing against theshoulders thereon, substantially as specified.

5. A pump comprising a casing open at its ends, screw-threads upon theouter surface of said casing at its ends an outlet-port for said casing,a piston and rod, a support f or 1 said casing having a socket thereincomprising a threaded portion of substantially the diameter of thecasing, adapted to engage the threaded lower end thereof, and a smoothportion of greater diameter than said casing adjoining said threadedportion, an annular packing disposed in the base of the threadedportion, a cap having a socket therein comprising a threaded portion ofsubstantially the diameter of the casing, adapted to engage thcscrew-threaded upper end thereof, and a smooth portion of greaterdiameter than said casing adjoining said threaded portion, and a volutespring disposed about said casing having its ends confined by thesockets in said support and cap, and bearing against the portionintermediate the smooth and threaded portions thereof, substantially asspecified.

Signed at the city of New York, in the county and State of New York,this thday of April, i905.

ARTHUR K. MILLER.

V'Vitnesses:

C. A. DiETERicH, Louis B. HAsBRoUcK.

